126631001 has 32 divisors (see below), whose sum is σ = 157065216. Its totient is φ = 99792000.

The previous prime is 126630997. The next prime is 126631003. The reversal of 126631001 is 100136621.

126631001 = 74² + 75² + ... + 724².

It is not a de Polignac number, because 126631001 - 2² = 126630997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126631003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382406 + ... + 382736.

It is an arithmetic number, because the mean of its divisors is an integer number (4908288).

Almost surely, 2^126631001 is an apocalyptic number.

It is an amenable number.

126631001 is a deficient number, since it is larger than the sum of its proper divisors (30434215).

126631001 is a wasteful number, since it uses less digits than its factorization.

126631001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 126631001 is about 11253.0440770487. The cubic root of 126631001 is about 502.1652776101.

Adding to 126631001 its reverse (100136621), we get a palindrome (226767622).

The spelling of 126631001 in words is "one hundred twenty-six million, six hundred thirty-one thousand, one".